The BMW M3 is a high-performance version of the BMW 3-Series, developed by BMW's in-house motorsport division, BMW M.
M3 models have been derived from the E30, E36, E46, E90/E92/E93, and F80 3-series, and sold with coupe, saloon and convertible body styles. Upgrades over the "standard" 3-Series automobiles include more powerful and responsive engines, improved handling/suspension/braking systems, aerodynamic body enhancements, lightweight components, and interior/exterior accents with the tri-colour "M" (Motorsport) emblem.
The last M3 coupe was produced in Germany on 5 July 2013, replaced by the F82/F83 M4 Coupe and convertible starting with the 2015 model year,[1][2] but the M3 name will remain in use for the saloon version.
The BMW M3 remains the only car ever to have earned more titles than the venerable Porsche 911 in Motorsport, and also is the most successful touring, and grand touring car ever to have participated in racing.
The BMW M3 ( wikipedia )